/* ── Theme variables ──────────────────────────────────────── */

/* Type + spacing tokens - theme-independent, declared once. --font-ui carries
   prose (descriptions, hints, headers, buttons); --font-mono carries codes,
   part numbers, IDs, VINs. This is the "hybrid" split: readable prose, monospace
   where alignment/identity matters. */
:root {
  --font-ui:   system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'SF Mono', 'Cascadia Code', 'JetBrains Mono', Consolas, 'Roboto Mono', ui-monospace, monospace;
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.5rem;
  --radius:   4px;
  --radius-lg: 6px;
}

/* Dark defaults */
:root {
  color-scheme: dark;
  --bg:           #1a1a1a;
  --bg2:          #2a2a2a;
  --bg3:          #222222;
  --bg4:          #111111;
  --border:       #333333;
  --border2:      #444444;
  --border3:      #555555;
  --text:         #e0e0e0;
  --text-hi:      #ffffff;
  --text2:        #aaaaaa;
  --text3:        #999999;
  --text4:        #7c7c7c;
  --text5:        #686868;
  --text6:        #565656;
  --accent:       #4caf50;
  --accent-bg:    #1a3a1a;
  --accent-bg2:   #1a2a1a;
  --accent-bd:    #2a3a2a;
  --accent-btn:   #2a4a2a;
  --accent-btn-h: #3a5a3a;
  --pn:           #79c0ff;
  --err:          #f44336;
  --row-hover:    #202020;
  --row-border:   #1e1e1e;
}

/* Light - applied when system is light and user hasn't overridden */
@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light;
    --bg:           #f8f8f8;
    --bg2:          #ffffff;
    --bg3:          #f2f2f2;
    --bg4:          #e8e8e8;
    --border:       #e0e0e0;
    --border2:      #d0d0d0;
    --border3:      #b8b8b8;
    --text:         #1a1a1a;
    --text-hi:      #000000;
    --text2:        #505050;
    --text3:        #666666;
    --text4:        #767676;
    --text5:        #8a8a8a;
    --text6:        #a2a2a2;
    --accent:       #2e7d32;
    --accent-bg:    #e8f5e9;
    --accent-bg2:   #f1f8f2;
    --accent-bd:    #a5d6a7;
    --accent-btn:   #e8f5e9;
    --accent-btn-h: #c8e6c9;
    --pn:           #0969da;
    --err:          #d32f2f;
    --row-hover:    #f4f4f4;
    --row-border:   #ebebeb;
  }
}

/* Explicit overrides - cascade order beats the media query above */
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg:           #1a1a1a;
  --bg2:          #2a2a2a;
  --bg3:          #222222;
  --bg4:          #111111;
  --border:       #333333;
  --border2:      #444444;
  --border3:      #555555;
  --text:         #e0e0e0;
  --text-hi:      #ffffff;
  --text2:        #aaaaaa;
  --text3:        #999999;
  --text4:        #7c7c7c;
  --text5:        #686868;
  --text6:        #565656;
  --accent:       #4caf50;
  --accent-bg:    #1a3a1a;
  --accent-bg2:   #1a2a1a;
  --accent-bd:    #2a3a2a;
  --accent-btn:   #2a4a2a;
  --accent-btn-h: #3a5a3a;
  --pn:           #79c0ff;
  --err:          #f44336;
  --row-hover:    #202020;
  --row-border:   #1e1e1e;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg:           #f8f8f8;
  --bg2:          #ffffff;
  --bg3:          #f2f2f2;
  --bg4:          #e8e8e8;
  --border:       #e0e0e0;
  --border2:      #d0d0d0;
  --border3:      #b8b8b8;
  --text:         #1a1a1a;
  --text-hi:      #000000;
  --text2:        #505050;
  --text3:        #666666;
  --text4:        #767676;
  --text5:        #8a8a8a;
  --text6:        #a2a2a2;
  --accent:       #2e7d32;
  --accent-bg:    #e8f5e9;
  --accent-bg2:   #f1f8f2;
  --accent-bd:    #a5d6a7;
  --accent-btn:   #e8f5e9;
  --accent-btn-h: #c8e6c9;
  --pn:           #0969da;
  --err:          #d32f2f;
  --row-hover:    #f4f4f4;
  --row-border:   #ebebeb;
}

/* Ensure the viewport canvas always matches the theme,
   not the UA's default (matters for centered-body layouts) */
html { background: var(--bg); }

/* ── Theme toggle button ─────────────────────────────────── */

.theme-toggle, .hdr-btn {
  background: none;
  border: 1px solid var(--border3);
  color: var(--text3);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  font-family: monospace;
  font-size: 0.78rem;
  white-space: nowrap;
  line-height: 1.4;
}
.theme-toggle:hover, .hdr-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.hdr-btn.danger { color: var(--text4); }
.hdr-btn.danger:hover:not(:disabled) { border-color: #c0392b; color: #c0392b; }

/* ── PR option list (shared by garage + viewer) ──────────── */
/* 50-100 codes don't work as wrapped chips - a fixed-height scrollable
   code/description list behind a count toggle keeps the surrounding UI stable
   no matter how long the option sticker is. */

.pr-toggle {
  background: none; border: 1px solid var(--border3); color: var(--text3);
  border-radius: 4px; padding: 0.15rem 0.5rem; cursor: pointer;
  font-family: monospace; font-size: 0.75rem; white-space: nowrap; line-height: 1.5;
}
.pr-toggle:hover { border-color: var(--accent); color: var(--text); }
.pr-toggle.on { border-color: var(--accent); color: var(--accent); background: var(--accent-bg); }

.pr-list { border: 1px solid var(--border2); border-radius: 4px; background: var(--bg);
           max-height: 13rem; overflow-y: auto; max-width: 46rem; }
.pr-row { display: grid; grid-template-columns: 4.5rem 1fr auto; gap: 0.5rem;
          align-items: baseline; padding: 0.12rem 0.6rem;
          border-bottom: 1px solid var(--row-border); font-size: 0.75rem; }
.pr-row:last-child { border-bottom: none; }
.pr-row:hover { background: var(--row-hover); }
.pr-row .pr-code { color: var(--accent); white-space: nowrap; }
.pr-row .pr-desc { color: var(--text2); }
.pr-row.unknown .pr-code { color: var(--warn, #c87800); }
.pr-row.unknown .pr-desc { color: var(--text4); font-style: italic; }
.pr-row .pr-x { cursor: pointer; color: var(--text5); padding: 0 0.2rem; }
.pr-row .pr-x:hover { color: var(--err, #d66); }

/* ── Diagram inversion ───────────────────────────────────── */

/* Dark default: invert black-on-white line drawings */
.diagram-wrap img { filter: invert(1); }

/* Light (system): no inversion */
@media (prefers-color-scheme: light) {
  .diagram-wrap img { filter: invert(0); }
}

/* Explicit overrides beat the media query via higher specificity */
:root[data-theme="dark"]  .diagram-wrap img { filter: invert(1); }
:root[data-theme="light"] .diagram-wrap img { filter: invert(0); }

/* ══ Shared component layer ════════════════════════════════════════════
   One vocabulary for every page: header, buttons, chips, cards, inputs.
   Pages compose these instead of redefining their own. Prose defaults to
   --font-ui; add .mono (or use --font-mono) for codes and part numbers. */

/* ── App header ─────────────────────────────────────────────────────── */
.pb-header {
  display: flex; align-items: center; gap: var(--sp-3);
  padding: var(--sp-2) var(--sp-4);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0; flex-wrap: wrap;
  font-family: var(--font-ui);
}
.pb-header h1 {
  font-size: 0.95rem; color: var(--text-hi); white-space: nowrap;
  letter-spacing: 0.02em; margin: 0;
}
.pb-header a { color: var(--accent); font-size: 0.82rem; text-decoration: none; white-space: nowrap; }
.pb-header a:hover { text-decoration: underline; }
.pb-header .spacer { margin-left: auto; }

/* ── Notice bar ─────────────────────────────────────────────────────── */
/* Full-width advisory strip under the header - e.g. the browser is blocking
   site storage, so the app runs read-only (bundled catalogs still browse). */
.notice-bar {
  padding: var(--sp-2) var(--sp-4);
  border-bottom: 1px solid var(--border);
  background: var(--bg2);
  border-left: 3px solid var(--warn, #c87800);
  color: var(--text); font-family: var(--font-ui); font-size: 0.82rem;
}

/* ── Buttons ────────────────────────────────────────────────────────── */
/* .btn is the base; modifiers layer on. .theme-toggle/.hdr-btn kept above
   as aliases for pages not yet migrated. */
.btn {
  display: inline-flex; align-items: center; gap: var(--sp-1);
  background: none; border: 1px solid var(--border3); color: var(--text2);
  padding: 0.3rem 0.6rem; border-radius: var(--radius); cursor: pointer;
  font-family: var(--font-ui); font-size: 0.82rem; line-height: 1.4;
  white-space: nowrap; transition: border-color 0.12s, color 0.12s, background 0.12s;
}
.btn:hover:not(:disabled) { border-color: var(--accent); color: var(--text-hi); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

.btn-primary {
  background: var(--accent-bg); color: var(--accent); border-color: var(--accent-bd);
}
.btn-primary:hover:not(:disabled) { background: var(--accent-btn-h); color: var(--accent); }

/* Toggle: use with .btn; add .on when active. */
.btn.on, .btn-toggle.on {
  border-color: var(--accent); color: var(--accent); background: var(--accent-bg);
}

.btn-danger { color: var(--text3); }
.btn-danger:hover:not(:disabled) { border-color: var(--err); color: var(--err); }

/* Count/notification pill on a button (active-filter count, etc). */
.btn-badge {
  display: inline-block; background: var(--accent); color: #fff;
  border-radius: 8px; padding: 0 5px; font-size: 0.62rem; line-height: 1.5;
  margin-left: 3px; vertical-align: middle; font-family: var(--font-mono);
}

/* ── Inputs ─────────────────────────────────────────────────────────── */
.inp {
  background: var(--bg2); color: var(--text); border: 1px solid var(--border3);
  padding: 0.35rem 0.5rem; border-radius: var(--radius);
  font-family: var(--font-ui); font-size: 0.85rem;
}
.inp:focus { outline: none; border-color: var(--accent); }
.inp.mono, .inp-code { font-family: var(--font-mono); }
::placeholder { color: var(--text5); }

/* ── Chips ──────────────────────────────────────────────────────────── */
/* Small labelled tags: active-spec summary, applicability, facet values. */
.chip {
  display: inline-flex; align-items: center; gap: 3px;
  border: 1px solid var(--border2); background: var(--bg3); color: var(--text2);
  border-radius: 3px; padding: 0.1rem 0.4rem;
  font-size: 0.7rem; line-height: 1.5; white-space: nowrap;
  font-family: var(--font-mono);
}
.chip-accent { color: var(--accent); border-color: var(--accent-bd); background: var(--accent-bg2); }
.chip-pn     { color: var(--pn); }
.chip-x { cursor: pointer; color: var(--text5); font-family: var(--font-ui); }
.chip-x:hover { color: var(--text-hi); }

/* ── Cards ──────────────────────────────────────────────────────────── */
.card {
  border: 1px solid var(--border2); border-radius: var(--radius-lg);
  padding: var(--sp-4); background: var(--bg2);
  display: flex; flex-direction: column; gap: var(--sp-2);
  font-family: var(--font-ui);
}
.card-title { font-size: 1rem; color: var(--text-hi); font-weight: 600; }
.card-sub   { font-size: 0.78rem; color: var(--text3); }

/* ── Utility ────────────────────────────────────────────────────────── */
.mono { font-family: var(--font-mono); }
.muted { color: var(--text3); }
.stack { display: flex; flex-direction: column; gap: var(--sp-2); }

/* Touch targets: on coarse pointers, give interactive controls room. */
@media (pointer: coarse) {
  .btn, .theme-toggle, .hdr-btn { min-height: 40px; }
  .inp { min-height: 38px; }
}